element.setStyle failing in FF 20.0.1

[jwestbrook]

previous lighthouse ticket #3101
by Eric Friedman

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Although the following prototype 1.7.1 statement works as expected in Chrome and IE10, it fails to set the background color of titleDiv in Firefox 20:
titleDiv.setStyle({ "background-color": titleBackgroundColor });

However, the following standard javascript statement works just fine in all 3 browsers:
titleDiv.style.backgroundColor = titleBackgroundColor;

[jwestbrook]

According to the documentation you need to use the camelCase version of the style attribute, backgroundColor vs background-color.
http://api.prototypejs.org/dom/Element/prototype/setStyle/
Chrome and IE10 are more forgiving on the style properties however Firefox is not.

[savetheclocktower]

Closing this for now. If other people end up reporting it, it might be worth guarding against this error somehow — either by attempting to convert to camelCase or by warning the user that hyphenated properties aren't going to work.